<template>
  <el-table :data="formatData" :row-style="showRow" v-bind="$attrs">
    
    
    <el-table-column   width="90" label="展开/折叠" align="center">
      <template slot-scope="scope">
        <span v-for="space in scope.row._level" :key="space" class="ms-tree-space"/>
        <span v-if="iconShow(0,scope.row)" class="tree-ctrl" @click="toggleExpanded(scope.$index)">
          <i v-if="!scope.row._expanded" class="el-icon-plus"/>
          <i v-else class="el-icon-minus"/>
        </span>
      </template>
    </el-table-column>

    <el-table-column v-if="columns.length===0" width="150"   >
      <template slot-scope="scope">
        <span v-for="space in scope.row._level" :key="space" class="ms-tree-space"/>
        <span v-if="iconShow(0,scope.row)" class="tree-ctrl" @click="toggleExpanded(scope.$index)">
          <i v-if="!scope.row._expanded" class="el-icon-plus"/>
          <i v-else class="el-icon-minus"/>
        </span>
        {{ scope.$index }}
      </template>
    </el-table-column>
    <el-table-column v-for="(column, index) in columns" v-else :key="column.value" :label="column.text" :width="column.width"  :align="column.align ? column.align: 'center'">
      <template slot-scope="scope">
        <!-- Todo -->
        <!-- eslint-disable-next-line vue/no-confusing-v-for-v-if -->
        <span v-for="space in scope.row._level" v-if="index === 0" :key="space" class="ms-tree-space"/>
        <span v-if="iconShow(index,scope.row)" class="tree-ctrl" @click="toggleExpanded(scope.$index)">
          <!-- <i v-if="!scope.row._expanded" class="el-icon-plus"/>
          <i v-else class="el-icon-minus"/> -->
        </span>

        <!-- 行内显示图片 -->
        <img   v-if="column.imgFlag==true"   :src="CMBASE.baseFileContext + scope.row[column.value]" width="60" height="60"  class="img"/>
        
        <i   v-else-if="column.iconFlag==true" :class="scope.row[column.value]"></i>

        <!-- 行内格式自定义 -->
        <span v-else-if="column.formatter"> {{column.formatter(scope.row)}}</span>
        
        <!-- 行内显示tag标签 -->
        <span  v-else-if="column.tagFlag==true">
            <span v-for="item in column.tagFormatter" :key="item.value" >
               <el-tag v-if="item.value==scope.row[column.value]"   :type="item.type">{{item.text}}</el-tag> 
            </span>
        </span>

        <!-- 行内显示开关按钮 -->
        <el-switch  v-else-if="column.switchFlag==true"  v-model="scope.row[column.value]"  disabled
            :active-value="1"  :inactive-value="0"   @change =  "(value) => column.changeEvent(value,scope.row)"  >
        </el-switch>
        <!-- 行内显示下拉列 -->
        <el-select  v-else-if="column.selectFlag==true"  v-model="scope.row[column.value]" >
            <el-option v-for="item in column.dataSource" :key="item.value"
                :label="item.text" :value="item.value">
            </el-option>
        </el-select>
        <!-- 行内显示文本内容（默认） -->
        <span v-else>{{scope.row[column.value]}}</span>


       
      </template>
    </el-table-column>
    <slot/>
  </el-table>
</template>

<script>
/**
  Auth: Lei.j1ang
  Created: 2018/1/19-13:59
*/
import treeToArray from './eval'
export default {
  name: 'TreeTable',
  props: {
    /* eslint-disable */
    data: {
      type: [Array, Object],
      required: true
    },
    columns: {
      type: Array,
      default: () => []
    },
    evalFunc: Function,
    evalArgs: Array,
    expandAll: {
      type: Boolean,
      default: false
    }
  },
  watch:{
    expandAll(nval){
      //  this.expandAll = nval ;
      this.formatData.forEach(record => {
        record._expanded = !record._expanded;
      });


    }
  },
  computed: {
    // 格式化数据源
    formatData: function() {
      let tmp
      if (!Array.isArray(this.data)) {
        tmp = [this.data]
      } else {
        tmp = this.data
      }
      const func = this.evalFunc || treeToArray
      const args = this.evalArgs ? Array.concat([tmp, this.expandAll], this.evalArgs) : [tmp, this.expandAll]
      return func.apply(null, args)
    }
  },
  methods: {
    showRow: function(row) {
      const show = (row.row.parent ? (row.row.parent._expanded && row.row.parent._show) : true)
      row.row._show = show
      return show ? 'animation:treeTableShow 1s;-webkit-animation:treeTableShow 1s;' : 'display:none;'
    },
    // 切换下级是否展开
    toggleExpanded: function(trIndex) {
      const record = this.formatData[trIndex]
      record._expanded = !record._expanded
    },
    // 图标显示
    iconShow(index, record) {
      return (index === 0 && record.children && record.children.length > 0)
    }
  }
}
</script>
<style rel="stylesheet/css">
  @keyframes treeTableShow {
    from {opacity: 0;}
    to {opacity: 1;}
  }
  @-webkit-keyframes treeTableShow {
    from {opacity: 0;}
    to {opacity: 1;}
  }
</style>

<style lang="scss" rel="stylesheet/scss" scoped>
  $color-blue: #2196F3;
  $space-width: 18px;
  .ms-tree-space {
    position: relative;
    top: 1px;
    display: inline-block;
    font-style: normal;
    font-weight: 400;
    line-height: 1;
    width: $space-width;
    height: 14px;
    &::before {
      content: ""
    }
  }
  .processContainer{
    width: 100%;
    height: 100%;
  }
  table td {
    line-height: 26px;
  }

  .tree-ctrl{
    position: relative;
    cursor: pointer;
    color: $color-blue;
    margin-left: -$space-width;
  }
</style>
